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Finding the Fourth Proportional to 420,746.32, 580,679.58 and 236,990.89

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Solution

The fourth proportional to 420,746.32, 580,679.58 and 236,990.89 is: 327,075.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,746.32 : 580,679.58 = 236,990.89 : x
  2. Step 2: Convert to fraction form
    420,746.32/580,679.58 = 236,990.89/x
  3. Step 3: Cross multiply
    420,746.32x = 580,679.58 × 236,990.89
  4. Step 4: Simplify right side
    420,746.32x = 137,615,770,469.03
  5. Step 5: Solve for x
    x = 137,615,770,469.03/420,746.32
  6. Step 6: Final answer
    x = 327,075.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.